Motion blur is one of the few reasons we should go higher with AA for. Set the Camera (AA) samples to about 3 or 4.Lower the threshold value for a render to be noise-free, maybe even to 0.010. Set the Adaptive Threshold to a value such as 0.015 or 0.02.A big maximum samples indicates that the quality is regulated by the noise falling under the threshold, instead of by clamping to the maximum AA. The maximum samples should typically be a high value. Camera (AA) from 30 to 50 range (you might go closer to 100 depending on the scene). Matching Noise on Arnold GPU vs CPUĪrnold GPU uses Camera (AA) sampling only so it’s better to use Adaptive rendering. Moreover, you could use CUDA_VISIBLE_DEVICES (environment variable) to modify which GPUs Arnold can see. In the Arnold plugins, go to Render Settings > System to find the Render Device setting. You easily switch between GPU and CPU render device with a single click. Image Source: Select Arnold CPU or GPU render device As the step-size parameter is decreased, the match with the CPU will get better and better.įor volume displacement, the match with CPU will get better and better as the step-size parameter is lowered. Secondly, in terms of OpenVDB, the GPU renderer is feature-complete and matches the CPU renderer visually pretty well.
As a result, the AA sample count needs to be higher in GPU renderings in order to get the same noise.
The reason for this is because GPU renders are “non-splitting” (one path per camera/AA sample). GPU renders are still noisier than CPU renders with the same settings. Yet GPU renders still can not compare to CPU renders in some extent. Arnold GPU is definitely faster than CPU. Starting as a production-proven CPU renderer, Arnold aims to deliver 1:1 results on the GPU as well. Light linking is not supported on volumes.Ĭheck out the full supported features and limitations. Pref, motionvector, shadow_matte, volume_Z, volume_albedo, volume_indirect, volume_opacity Let’s see the list of limitations below: DriversĬryptomatte_manifest_driver, driver_deepexrĪll filters (except blackman_harris_filter, box_filter, gaussian_filter, triangle_filter, closest_filter)Ĭlip_geo, cryptomatte, float_to_matrix, matrix_interpolate, matrix_transform, motion_vector, toon, trace_setĬone, cylinder, disk, implicit, volume_implicit
However, there are still some limitations to rendering with Arnold GPU. The developers made it easy to toggle between CPU and GPU rendering, keeping the same settings with a single click.
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